Two bells ring at an interval of 20 minutes and 30 minutes respectively. If both the bells rang together at 9 PM for the first time, at what time will they ring again?

9: 45 PM

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10:00 PM

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9: 30 PM

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10: 15 PM

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Solution

The correct option is B
10:00 PM
.

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Two bells ring at an interval of 20 minutes and 30 minutes respectively. If both the bells rang together at 9 PM for the first time, at what time will they ring again?​

The correct option is B 10:00 PM.

Two bells ring at an interval of 20 minutes and 30 minutes respectively. If both the bells rang together at 9 PM for the first time, at what time will they ring again?

The correct option is B
10:00 PM
.